Drill-press attachment.



G. J. COSTELLO DRILL PR'ESS-ATLTACHMENT. APPLICATION -FILED APR. 28, 1910- Ratentj e d July 4, 1916.

v e;1. COSTELLO. I

. DRILL PRESS ATTACHMENT.

mwcmou HLED.;APR.2' 1-91 Patented July 4', 1916'. {SHEETS-SHEET 2 rods, pump rods,

etc., and for keyseating cured, or upon- GEORGE J. COSTELLO, OF PHILADELPHIA, PENNSYTNANIA;

DRILL-PRESS ATTACHMENT.

Specification of Letters Patent.

To all whom it may concern:

Be it known that I, GEORGE J. Cos'rELLo, a citizen of the United States, residing in Philadelphia, in the county of Philadelphia and State of Pennsylvania, have invented a new and useful Drill-Press Attachment, of which the following is a specification.

My invention relates to improvements in portable keyseating machines or jigs.

My object is to provide improved means for cutting holes, slots, keyways, etc.-, in shafts, rods, etc.

- This device is designed for the purpose of making possible the rapid and accurate drilling or working of a hole, slot, or key- I way of any desired dimensions, in a length of shafting, such as shafts and studs of various kinds. It is intended to be used in connection with an ordinary drill press, to the table or bed-of which the device is sewhichit may rest. It is therefore essentially a jig for holding-the shaft, rod, etc., firmly in position while the work is being done, and for guiding the drill or other cutting tool used, accurately to the work, and absolutely to the longitudinal axis thereof, if desired. It may be used for working keyways. in power transmission shafting in shops, by clamping the device to the shafting at the pointwhere the keyway is to be cut, and driving the cutting tool by hand or by a portable power drill. This is of great value when, in a shop, it is necessary to shift a pulley along'a shaft to a new location.

Referring to the drawings which illustrate as an example apr'eferred embodiment of my invention, Figure 1 is aplan view of my device. Fig. 2 is an elevation of same. .Fig. 3 is a vertical section on line 3-3 of Fig. 1. Fig. l is an elevation of a special attachment for applying myinve'nti'on for work on shafts of large diameter.

. Fig. 5 is a sectional elevation of the lower portion of said attachment on an enlarged scale.

Similar numerals refer to similarparts throughout the several views.

The device as illustrated in the drawings, consists of a metal frame? ordinarily adapted to rest upon or to be securrd to the table or 'bed of the drill press. This frame 7 carries a sliding bracket or guide member 8 Application filed Ap1i128, 1910.

engine shafts, pistonvalve stems, .boring bars,-

Patented J nly 4, 1916.

Serial No. 558,181.

gibbed to it, and provided with take-up crews 9 and .10. member 8 may be clamped to the frame 7 by means. of a lock-dog 11 at any point of its travel along 7. Lock dog 11 is threaded on a threaded extension of lug 51 which is tapped into bracket 8. out to receive a bushing 12 preferably of hardened steel, of the proper diameter and bore to'take the drill or tool 13 to be used;

the latter having a close working fit in the bushing 12. This bushing thus acts as a positive guide for the drill or tool as close to the work as possible. I

The supporting base or frame 7carries a sliding bracket or work support 13 which has a V-shaped groove 14 carefully machined parallel to feed screw 15. The clamps 16 and 17 serve to hold the shaft 18 or other objectfirmly in the V-groove while work is being done upon it. The hole containingthe bushing .12 lines up at all times perpendicular to the longitudinal axis of the shaft 18 or other work to be machined, so that slots, holes or keyways will always be out along the longitudinal axis, excepting when the workis thrown out of line by inserting aliner along one of the sides of the V-groove, which may be done if it is desired to cut a hole of any kind ofii' the center. Thislparallelism'of the V-groove 1% to the line or travel of the sliding bracket 8 is of the utmost importance, and, is obtained by so fitting 8 on the housing 7 that 8, and therefore the tool carried in the bushing 12 will, at all times, plumb the intersection of the planes of the sides of the V-gr-oove l-l at the bottom thereof. From this itwill result that the longitudinal axis of the tool will at all times intersect the longitudinal axis of the work operated upon, or in case the work is spherical in form, the longitudinal axis of the tool may be brought into alinement with the center of said spherical body. By the use of this bushing as slmwn, the toolqisheld firmly and centrally to the work at-all times eliminating all spring of drill or tool while working slots. grooves. etc.

For accurately spacing the travel of the tool-along the work, the top surface of the housing pointer or indicator 19 for reading the travel of 8 is arranged on top of the bracket 8. "he feed screw 15 may have for exam- Tlie bracket or guide,

Bracket 8 is bored 7 is graduated as at 40,-and the" Iple twenty threads by the crank-20 at per inch and is operated one end. The collar 21 ample, five in number. Hence the move ment'of the crank handle 20 throughone- {handle 50. It will be understood that .,changeable bushings are used to suitthe fifth of a turn or one-tenth for example, -;w1ll give a longitudinal travel to bracket 8 and hence-to the tool along the work, of

one one-h'undre'dths or one twohundredths '1. respectively.

number of threads perinch desired and the '-micrometer sleeve The feed screw may have any or collar may be arranged for feeds of fractions or decimals ofan inch as desired. By this means the holes, slots, or keyways may be accuratelyeut to dimensions desired, down to one one-thousa-indths.

Among the advantages of this deviceare saved in laying off work; second, the time saved in adjusting the tool to closely drawn limit lines on work; third,

milling of slot-or keyway by use of cotter drill made by grinding to proper shape a piece of drill pering it. While vI have shown-the bracket or ill-block clamping member 13 slidably.

mounted in the supporting base or frame? and operated by the feed screw 41 actuated by the crank 42, it will be understood that in some casesthis bracket 13 may be integral withthe housing or frame 7. ,Among the advantagesof having the'preliminary adjustment of the work to be operated upon, and second to move the work soas to increase the range of operation of the bracket 8. p

When the bracket 13 is slidablymounted .as shown the take-up screws such as 22and 23 maybe provided. The clamping device consists of the flat members 16 and 17 being fecessed as at 44:. Said recesses being preferahly V-shaped having the line of intersection of its two inclined walls in the same vertical plane as the line of intersection of the walls of the V-groove 14. These members 16 and 17 are clamped down into place upon the work, or shaft 18, by the nuts on the bolts -16. A further tightening is then secured by the knurled set-screws 47 and 48. v

The bushing '12 is held in place by the set-screw 49 provided with an openating inter- Zdifierent sizes'of tools used. The bracket 8 is provided with the lug 51 tapped into the bracket having athreaded opening for cooperation with the feed screw 15.

When work is to be done with the jig upon shafts of such size that it would not be practicable to slide the 1g upon the bed plateor the table of the drill areas or to slide the V-groove carrying working-noon the latter. if n rod of right length and tem it movable with re-' spect to the frame 7, are first to facilitate.

tachment's'uch for example as is shown in Figs. 4 and 5..,This device consists of the connected by the .-universal'joint 25 to a hollow shaft 26 in which is cut a keyway 27. By means of this keyway 27 and a key 28 on shaft 29 the shaft 29 has a slidable engagement in hollow shaft 26, but is constrained to' turn therewith. Shaft 29 is connected by the universal joint 30 to the spindle 31. Spindle 31 is provided with the integral collar 32 and also at its lower end with the tapered aperture 33 terminating in the threaded portion 34 for receiving the cutting tool 35. spindle 31 and tension. 37 is a knurled feed nut threaded to receive the sleeve 36 receive the collar 38 which performs the function of a lock nut.

The operation of this device is as follows: The shaft'39 having been properly secured in the V-groove I4 of the jig, the sleeve 36 is inserted in the opening in bracket 8 in thplace of the bushing 12, and secured in place by becomes the bushing in "the boss of bracket 8, and onturning the knurled feed nut 37 The sleeve 36 surrounds the in one direction or the other, the desired feed of the cutting tool is secured. Now, -by turning the crank handle 20 of the feed screw 15 thelbracket 8 is operated to secure the longitudinal feed of the cutter 35 to se cure the work desired. It will be understood that the universal sible-to transmit to-spindle 31, and hence to the cutter, the revolutions of the spindle of the press, although the cutter has moved out of vertical alinement with the spindle. It will also be understood that any flexible connection betweenthe power and the tool, that may be found convenient,may be used, and also that different sizes and styles of cutters may be used according to the work in hand.

That I claim is 1. In an apparatus for forming recesses in shafting or the like, the combination of a frame, a work support having a slidable engagement therewith parallel with the lon-' 2. In a device for forming recesses in;

shafting or the like, the combination" ofya .work support; a movable-body for carrying the tool arm the work,the work support and nuu'ah c is threaded at its upper ex and also threaded .to-

the set-screw 49, that is to say, 36

and the work into. any a having a normallyjcionQ joints make it pos- 3. In a drill press attachment, the combination of a clamp for securing the work tothe attachment, am'ovabletool guiding body,

a feed therefor and locking means connected with the to'olguiding'body and a stationary part of the attachment;

4. In a drilljig, he combination of a frame, a work engaging element movably mounted thereon, a tool-guiding body, a support therefor projecting from the frame to one side of the work engaging element, and a-tool, the tool-guiding body and the work engaging element each being capable of relative movementat right angles to the axis of rotation of the tool and havinga. fixed relationship during said movement, at right angles thereto and to the said .tool axis.

5. A drill jig comprising a clamp for the work, a support for the clamp, the clamp and support havingslidable relationship, a bracket provided with a space for aremovable bushing,. bushing within said space and adapted to extend close to the-work, a bracket support, the bracket, and-support having a slidable relationship to permitof relative movement therebetween parallel with the work, means for causing relative movement-between bracket and support and means for clamping the'bracket and the support in immovable relative relationship.

6; In a device for forming recesses in shafting or the like, the combination of. a supporting base,'-a work-engaging element 'slidably mounted thereon, a tool-guiding body, and a support therefor projecting from said base, the tool-guiding body and shafting or the like,

the work-engaging element having a normally constant relative relationship with respect to'the longitudinal axis of the work and one of the-same being movable with re- 's'pect to the other in line with said axis.

7. In a; device for forming recesses in shaftin'g orthe like, the combination. of a relatively ibroadflat base having an upwardly extending bracket-supporting portion, a work-engaging portion slidably mounted on said base, and a tool-receiving bracket slidably connected with said upwardly directed portion, said" bracket overhanging the work-engaging portion and relatively movable with respect thereto.

8. Ina device for forming recesses in 'thecombination of a supporting base, a work-engaging-element, the base provided with a slotted extension,

an apertured bracket having a portion slidable'in said slot, and having a tool receiving portion in line with the V-element, and means for maintaining the bracket in desired position of relative adjustment along the slot.

9..' "In a device. for forming recesses in shafting' or the like, the combination of a supporting' base provided witha slotted extension, a work-engaging V-element, means for. securingthe work therein, a tool-receiving bracket overhanging the V-element and sli'dably connected with said slotted exten sion, and means operatively connected with the slotted extension for moving the bracket along the same.

GEORGE J. COSTELLO.

Witnesses:

-M AE Hornaxx,

Ho'wann S. Own. 

